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lcpi2_0
2010 Apr 02
2
[LLVMdev] Problem returning aggregate struct (complex number) by value
...4-bit on OSX 10.6/x86-64.
The IR I generate for a simple test case looks like this (float case):
%0 = type { float, float }
define %0 @test600() {
entry:
ret %0 { float 4.200000e+01, float 3.500000e+01 }
}
Running that through llc, the x86-64 assembly looks like this (abbreviated):
movss LCPI72_0(%rip), %xmm0
movss LCPI72_1(%rip), %xmm1
ret
Now, if I write a C function that does the same thing:
struct complex_float {
float real;
float imag;
};
static struct complex_float foo()
{
struct complex_float x = {42.0, 35.0};
return x;
}
The assembly code looks like this (com...